Performance Enhancement of Electrocatalytic Hydrogen Evolution through Coalescence-Induced Bubble Dynamics
Max Planck University of Twente Center for Complex Fluid Dynamics · Leiden University · +2 more institutions
Abstract
The evolution of electrogenerated gas bubbles during water electrolysis can significantly hamper the overall process efficiency. Promoting the departure of electrochemically generated bubbles during (water) electrolysis is therefore beneficial. For a single bubble, a departure from the electrode surface occurs when buoyancy wins over the downward-acting forces (e.g., contact, Marangoni, and electric forces). In this work, the dynamics of a pair of H2 bubbles produced during the hydrogen evolution reaction in 0.5 M H2SO4 using a dual platinum microelectrode system is systematically studied by varying the electrode distance and the cathodic potential. By combining high-speed imaging and electrochemical analysis,…
Citation impact
- FWCI
- 14.55
- Percentile
- 100%
- References
- 78
Authors
7Topics & keywords
- Bubble
- Chemistry
- Buoyancy
- Electrode
- Coalescence (physics)
- Electrolysis
- Electrolysis of water
- Mechanics